Cement



COATING R PLASTIC. tress aeietence CEIENT.

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To all whom it may concern:

Be it known that I, WALTER T. GoonARn, a citizen of the United States, residing at Hamilton, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Cements; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a composition of matter which is especially useful in connection with the high voltage type of insulator and has for its object the production of a cementitious compound which is highly tenacious, durable and to a limited extent v elastic.

C One of the rincipal objects of the invention is to pr uce a cement, suitable for use v as the bindin element between an insulator and this increase causes tremendous pressure on the insulator units, in fact the pres:

unit of porce ain or glass and another similar unit or the metallic element which forms the connection between the insulator and another insulator or the support by which the insulator is sustained, This object is accomplished by incorporating in the cement a granular ingredient which is treated with an elastic substance so that when said ingredient is incorporated in the cement, the latter will have the desired degree of elasticity.

Before describing my invention in detail, it is believed that it will lead to a better understanding to describe the general practice now followed in connectitng porcelain insulator units to each other or to the hardware, such as metallic caps, eyebolts, .etc. The insulator is generally provided with substantially c lindrical neck or stem over which is place either another insulator unit or a metallic bell-shaped cap. Between the two members thus joined is poured a very liquid cement generally composed of .a mixture of Portland cement and sand. The celuti w c m Specification of Letters latent.

Patented Mar. '7, 1922.

7 Application filed June 17, 1919. Serial ll'o. $04,881.

ent of the cement mixture is amply sufii cient to compensate for the increase in bulk or volume of the cement without causing ex-l cessive pressure upon the insulator parts.

In making the cement mixture, according to my invention, it is preferred to combine with Portland cement or a like substance, as the same is commercially manufactured, a certain proportion of sand or other suitable filler or aggregate and to add to these ingredients a certain percentage of filler or aggregate which has been previously or initially treated with an elastic solution, to thereby coat said percentage, of filler or a gregate with a surrounding envelope whic is highly elastic.

Ithas been found that the following percentages used in a cement mixture produce a cement possessing the desired amount of mtalasticity for use ,in connection with insulaors:

to 15 or 20% without departing from the sec e of my invention.

he coated filler may comprise send an- L ulated gum ranula d sla or anu l e rce am or @matnal anh this materia titt -w red b she sosso vmg immersion in an orme a y ment mixture makes va rigid bond between ru er in carbon di-sulphide or other s uitthe insulator units vand prevents the separaa e so v Tlie foregomg mixture makes a smooth and uniformcement which may be readily poured and which possesses suflicient elasticity to overcome the injurious results of cement mixturesnow commonly used in connectinginsulator units.

Having now described my invention, what I claim and Hesire to seciii'e hy Letters Fatent iszan elastic substanee.

3. A cement composition containing a non- 10 flfizibfl'eifillar "initially coated wiihnibber.

An lastic oment composition compris- 1. A cement composition contaifiifi'gafi'in 'ifigdinent and a filler or aggregate, a pot- 5 ert-nomfriable element initially mateciwvith tion oi-said filler or aggregate being iniiif'mB-y mtedwith an elastic substance. 15

2. A cement composition containing a non-f Jig-testimony whereoi Iafiix my signature.

friable filler initially coated with an elastic substance.

WALTER T. GODDARD. 

